OF PERIPATUS CAPENSIS. 903 



former has a peculiar nick or bend in it. At this nick it is firmly 

 attached to the ventral side of the foot by muscles and tracheae, 

 and when cut away from its attachment the muscles and tracheae 

 cannot easily be detached from it. The main part of the coils 

 are formed by region No. i, and the epithelial cells lining this 

 part present very characteristically the striated appearance which 

 has already been spoken of. The large-celled region of the 

 coiled tube (fig. 2~) is also of considerable dimensions, and the 

 terminal portion is wedged in between this and the commencing 

 part of the coiled tube. The terminal portion with its internal 

 opening is in its histological characters exactly similar to the 

 homologous region in the hinder nephridia. 



The three pairs of nephridia in the three foremost pairs of 

 legs are very rudimentary, consisting, so far as I have been 

 able to make out, solely of the collecting vesicle and the duct 

 leading from them to the exterior. The external opening is 

 placed on the ventral side of the base of the feet, in the same 

 situation as that of the posterior nephridia, but the histological 

 characters of the vesicle are similar to those of the fourth and 

 fifth pairs. 



GENERATIVE ORGANS. 



[The sexes are distinct, and the average size of the females 

 appears to be greater than that of the males. 



The only outward characteristic by which the males can be 

 distinguished from the females is the presence in the former of 

 a small white papilla on the ventral side of the i/th pair of legs 

 (PI. 47, fig. 4). At the extremity of this papilla the modified 

 crural gland of the last leg opens by a slit-like aperture. 



The generative orifice in both sexes is placed on the ventral 

 surface of the body, close to the anus, and between the two anal 

 papillae, which are much more marked in small specimens than 

 in large ones, and in two cases (of females) were observed to 

 bear rudimentary claws. 



I. The Male Organs. PI. 53, fig. 43. 



The male organs consist of a pair of testes (te\ a pair of 

 prostrates (/;-) and vasa deferentia (vd) and accessory glandular 

 tubules (/). 



